Burglar alarm



Jan. 1925. 1,522,318

H. NEIVERTH ET AL BURGLAR ALARM Filed July 6; 1925 w m m Ir!" Mei/0mm Patented Jan. 6, 1925.

UNITED STATES 1,522,318 PATENT, OFFICE.

HYMAN NEIVERTH, OF NEW YORK, N. Y., AND PAUL G, HAAN, OF JERSEY i HEY,

NEW JERSEY. I

BURGLAR ALARM.

Application filed m 0, i923. Serial No. 649,881..

To all whom it may concern:

Be it known that we. HYMAN NEIVERTH and PAUL C. HAAN, citizens of the United States, residing at NewQYork and Jersey City, respectively, in thecounties of New York and Hudson and States of New York.

and New Jersey, have-invented certain new and useful Improvements in Burglar Alarms, of which the following is a speci fication. I

i This invention relates generally to burglar alarms, being intended more particularly for use in stores, banks and the like, the invention having for an object the provision of a novel type .of burglar alarm which will act both to give an adequate alarm to all in the near vicinity, and will also serve tofrighten the burglar or burglars.

More specifically speaking the invention has for an object the rovision of an alarm comprising an electrically operated pistol which may be loaded with blank cartridges and which is operated, to successively discharge all its cartridges, by simply pressing a button.

For further comprehension of the invention, and of the objects and advantages thereof, reference will be had to the following description and accompanying drawings, and to the appended claims in which the various novel features of the invention are more particularly set forth.

Fig. 1 of the drawings is a diagrammatic view illustrating the positioning of the device in a store.

Fig. 2 is a side elevation, with parts in longitudinal section, showing the means for firing the pistol and rotating the cylinder thereof, showing the parts in the osition with the hammer head engaging tridge. Fig. 3 is a plan view.

Fig. 4 is a detail transverse section taken on the line 4-4 ofFig. 2. i L Fig. 5 is diagram of thewiring circuit.

the ,car-

The electrically operated pistol which assumed when the pistol is being disc arged,-.

som sash, although it is to be understood that the position may be varied to suit local conditions. The 10 suitably fo'rme .on a frame element 11 which carries a revoluble' cartridge holding element 12 in the form of the usual cylinder provlded with a: number of cartridge chambers. L

Fixed .to one end of the cylinder 12 is a ring gear 14 meshing with a pinion 15 fixed .on one end of a spindle 16 extending longitudinally under the cylinder 12, and adapted to rotate the latter step by step- Formed in the cylindrical wall of the spindle 16 are a number of longitudinally extending grooves 17 which are connected one with the other by means of spiral grooves 18 so that a continuous path around the spindle is formed for a pin 19 fixed in a'sleeve 20 surrounding the spindle and adapted to engage therein.

The sleeve is suitably supported by a part of the frame 11. The spindle 16 is normally given-a rotary impulse in one direction by a clock spring mechanism, indicated generally at 21, applied thereto, this spring commg into active operation only when the pin piistol comprises a barrel 19 reaches the points of intersection of the grooves 17 and 18 and acting to ensure of the pin passing from one groove to the adj acent one. The sleeve 20 may be held against rotary movement by a tongue 20 thereon engaging in a groove in the frame 10.

To fire the cartridges we provide a hammer in the form of an arm 25 hinged at its lower end to the frame as at 26 and having a striker 27 on its upper 'end adapted to hit the head of the cartridge, a slot 28 being provided in the frame to accommodate the free end of the hammer. The hammer is urged backward by a spring 29 fixed to the frame and bearing on the hammer, backward movement of the latter being limited by apin 32 fixed thereto and engaging in a short slot 33 in theframe concentric to the pivot-point of the hammer.

The hammer is adaptedto be operated by means of a solenoid 36 whose plunger 37 has a brass pin 38 extending axially therefrom to engage the hammer. The sleeve 20 is given a longitudinal movement, to rotate the spindle 16 and in consequence the cylinder 12, by means of a second solenoid 40 whose plunger 41 is rigidly connected to the sleeve by a brass rod 42. The plungers of the two solenoids are returned to inoperative posi tion by means of expansion springs 43 coiled around the rear ends thereof and bearing between the ends of the solenoids and insulating collars 44 fixed on the plungers.

The control means for the solenoids is so [arranged that when one of the push buttons is pressed the solenoid 40 is first energized, and after the plunger 41 thereof has moved forward it closes the circuit through the other solenoid, causing the pistol to be fired, the circuit to both solenoids being then automatically opened, and again closednvhen the plungers have been moved to normal POSI- tions under the influence of the springs 43.

'To this end a pair of normally open suitrock-lever 51 fulcrumed between its ends to the frame as at 52 and having inclined surfaces 51' on each end one of which is adapted to be engaged. by one of the collars 44 above referred to and the other by an insulating arm 53 fixed on the rod 38, to respectively open and close the circuit.

The wiring connections are indicated in Fig. 5 and comprise two main leads 60 and 61 respectively, suitably branched by leads 62 connecting to ordinary push-button switches 63, a battery 64 being placed in the lead 60. The wire 60 connects directly to the solenoid 40. from which a wire 65 leads to one of the contacts 50, the main lead 61 connecting to the other of said contacts. From the main lead 60 a wire 66 leads to one of the, contacts 47 and from the other of said contacts a wire 67 leads to one terminal of solenoid 36, a wire 68 connecting this solenoid with that one ofthe contacts 50 to which the wire 65 above referred to, leads.

As will be apparent, when one of the pushbuttons 63 is actuated, the'solenoid 40 is energized and its plunger 41 moves forward. As the plunger 41 nears the limit of its forward movement the arm 48 thereon engages and closes the contacts 47, causing the solenoid 36 to be energized in turn and its plunger 37 to move forward and operate the hammer to fire a cartridge in the cylinder 12. As the plunger 37 reaches the forward end of its movement the collar 44 thereon rides under the end of lever 51 and causes the opposite end which has been'holding the contacts 50 closed, to move away from said contacts and thereby open the circuit to both solenoids, whose plungers then move backward under the influence of the springs 43.

It will be noted that during the forward movement of the solenoidplunger 41 the pin 19 on the sleeve 20 travels along one of the longitudinal ooves 18 in the spindle 16 so that'no rotation of the latter occurs,

plunger of the solenoid 36 is reaching its extreme rearward position the arm 53 engages under the other end of the lever 51 and .causes the latter to be lifted to close the contacts 50 and cause the operation to be repeated. The spring retracting the plunger of the solenoid may be made of sufiicient strength to ensure of this plunger moving fully back before the contacts are closed by the arm 53. y In Fig. 1 of the drawings we have shown our invention applied to a store with the push-buttons 63 suitably positioned under the various desks, counters and show-cases thereof. As will be understood a suitable opening will be cut in the transom sash 7 5 to accommodate the barrel 10. To permit of ready removal of the device it may be secured in place by nuts 76 threaded on screws 77 fixed .to the sash and passing through lugs on the frame 11. The lever 51 will have suflicient frictional contact with its fulcrum to ensure of its remaining in its alternating positions. An alarm bell 80 may be included in the circuit and placed at any suitable point.

Having thus described our invention what we claim as new and desire to protect by Letters Patent of the United States is as follows:

1. In a burglar alarm. a pistol having a rotarv cylinder, a hammer. an electrically controlled means for operating the hammer and rotating the cylinder. said means including a pair of solenoids having their plungers operatively connected respectively to the hammer and the cylinder, and normallv open contact elements adapted to be closed by the plunger of the cvlinder operating solenoid to close the circuit to the other in the said grooved path, and a solenoid for moving said sleeve longitudinally.

3. In a burglar alarm, a pistol having a rotary cylinder, a spindle for rotating said cylinder said spindle having a grooved path extending completely therearound and comprising alternating longitudinal and spiral grooves, a sleeve encircling said spindle and having a pin engaging in the said grooved path, and a solenoid for moving said sleeve longitudinally, and a spring urging said spindle in a rotary direction.

4. In a burglar alarm, a pistol having a rotary cylinder, a hammer, and electrically controlled means for operating the hammer and rotating the cylinder, said means including a pair of solenoids having their plungers operatively connected respectively to the hammer and the cylinder, one of said plungers being adapted to operate in advance of the other, and contact elements adapted eluding a pair of solenoids having their 7 plungers operatively connected respectively to the hammer and the cylinder, one of said plungers being adapted to operate in advance of the other, and contact elements adapted to be closed by the said plunger to close the circuit through the other solenoid, and a rocking lever adapted to alternately open and close the circuit to the said solenoid as the plunger of one of the solenoids moves in opposite directions.

In testimony whereof we have affixed oursignatures.

, HN NEIVERTH.

PAUL G. 

